Peleg's equation was used to model moisture sorption in soybean, cowpea and peanuts at 2°C 25°C and 40°C. Peleg K, varied with temperature while Peleg K2 was not relatively affected. Peleg Kz could be used as a water absorption parameter. The lower the K2 value, the more water was absorbed. Values of K, and K2 were predicted for each of the cultivars of the legumes studied. There was no significant (P>O.O5) difference in either Kr or Kz value for both the dehulled and undehulled peanuts. Peleg equation with the predicted constants gave fairly good fit for water absorption in the legumes.